Under-water exhaust.



Patented sept. 23, 1913.

gnou/vlo@ .lnllllllllllllllllll/ @wi/tucson MILON VAL MILLER, 0F CHICAGG, ILLINOIS.

UNDENWATEB EXHAUST.

Specification of Letters Patent.

Patented Sept. 23,1913.

Application filed October 28, 1912. Serial No. 728,221.

To all whom t may concern Be it known that I, MILoN VAL Mmmm a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Under-Water Ex hausts; and I do declare the followm to be a full, clear, and exact description o the.

invention, such as will enable others skilled in the art to which itv appertains to make and use the Same.

This invention relates to internal combustion engines, and more especially to the exhaust treatment thereof; and the object of the same is to provide an exhaust for outboard gasolenc engines such as are clamped over the stern of a launch, which .exhaust will convey the gases from the engine to a point beneath the water level so as to Inutile the sound ofthe pulsations, avoid smoke and odors, and produce suction on theexhaust pipe by disposing its outlet end Just 1n advance of the propeller, meanwhile making provision for opening a relief in the exhaust when desired.`

These objects are carried out by constructing the under water exhaust in a manner hereinafter more fully described and claimed, and as shown in the drawings Wherein- Flgure 1 1s a general perspective vlew of 4 the rear end of a boat 1n outline with the Evinrude motor attached, showing the adaptation of my invention thereto, Fig. 2 is an enlarged rear elevation of my exhaust removed from the motor and boat, the same being shown partly in section. Fig. 3 is a central vertical sectional view throughout the length of the exhaust, on the line 3 3 of Fi 2. Fig. 4 is a detail of the outlet end o? the exhaust showing the notch in the bottom thereof.

In the drawin s the letter B designates a launch or other oat, to whose stern in the present instance is attached a framework F carryin a motor M from which de 4ends a sleeve through which ower is transmitted to the propeller P, an the exhaust of the motor is roughly indicated at The object of the present invention 1s to convey the exhaust ases from the point to a point below t e water level and just 1n advance of the propeller P, whereby the rotaf tion of thelatter will createsuction on the exhaust so as to facilitate the .running of the engine, and the fact that the exhaust gases are discharged below the water level will deaden the noise thereof and suppress the smoke and odor rising therefrom.

Coming now more particularly to the present invention, shown in the embodiment erewith as ap lied to a sleeve S which it will be observe is telescopic in the Evinrude motor so that the propeller P can be set at the desired elevation according to the build of the boat B, my exhaust consists of a pipe made also telescopic in order that it may be len hened as the sleeve S is lengthened or s ortened as the sleeve is reduced in length. This pipe has an upper section 1 over which telescopes a lower section 2, the sections being connected b any suitable means such as a clamp 3 whic may be ti htened up after adjustment and which poss1 ly may serve as one of the means of supporting the device; the lower section 2 passes through another clam 4 which in the present instance engages tie sleeve S as shown, and its lower end is turned to the rear into an elbow 5 whose outlet end 6 stands just in front of the ropeller P and whose lower side is notched) in V-shape as seen at 7. The upper end of the upper section 1 is connected in any suitable manner, as by the clamp 8, with the exhaust E of the motor M. It follows that when the motor is started running, the exhaust gases are conveyed down through the sections 1 and 2, and b the elbow 5 are turned to thc rear and de ivered out through the end 6 directly toward and close in front of the propeller P so that the rapid rotation of the latter creates a artial vacuum within the elbow and there ore sucks on the gases therein and a draft is produced throughout the length of the exhaust while the propeller is running. The presence of the notch 7 in the bottom of the rear end of the elbow also assists in settino` up the suction referred to, because while tie boat is traveling forward the rearward movement of the water through this notch adds to the suction downward which is set up throughout the length of the exhaust. y l

In the adaptation of my invention to the Evinrude motor as illustrated, it becomes necessary to put elbows 10 and 11 in the upper sect1on 1 so that the upper end thereof will stand a little to one side of and out of alinement with the lower end and with the lower section 2, and the upper extremity' of the upper member can be clamped at B to the exhaust E of the motor. It will be clear Ythat when this device is applied to other types of motors, these elbows 10 and 11 may be4 emphasized, otherwise disposed, or in some instances possibly omitted; but the purpose in providing them is to cause the upper extremity of the upper section to connect with the motor exhaustl E, and the length of the lower section to follow the sleeve S or whatever other portion of the framework s pports the drive shaft for the propeller P go that the outlet end 6 of the lower section shall stand strictly in front of the propeller blades.

An amplification or refinement of my invention consists in providing one ofthe sections vat a suitable point with a relief opening 1,2 herein shown as produced by cutting away one'side of the upper section 1, and this opening is adapted to be closed or opened at the will of the operator. In the present instance I have shown the closure as consisting lof a collar 13 vslidably inclosing the upper section 1 and adapted to be moved so as to expose the opening 12 as shown in Fig. .2 or to close the same as shown in Fig. 3 being surrounded through its arms and both standing within reach of the operator. With the set screw adjusted moderately tight the operator can grasp the clamp-14 and slide the Acollar upward or downward, thus closing or opening the relief 12 at will; or he may tight-en the set screw when the collar stands over the relief, and the exhaust pipe will then be complete from the exhaust E to the outlet i details of construction, and the relief may be added ornot as desired. It is quite obvious that 4the elbows 10and 11 are only to be ern loyed when the shape of the motor and its ramework require. The sizes and materials of parts are not essential to the present invention.

' What is claimed as new is:

1. Thecombination with a boat, a motor, an upright framework detachably connected with the stern ofthe boat, an upright sleeve carried by the framework, and the propeller at the lower end of saidfs'leeve; oflan ex-' haust. pipe connected at its hpper end with the exhaust of the motor, its body led downward alongside said sleeve, and its lower 'end Having an elbow whose outlet end ijs the collar in this instance; by a clamp 14 which may be'tightened by means of a set screw 154 directed rearward toward and stands close to the propeller so that rotation thereof. sets up suction in said pipe and means forclampingsaid pipe to said sleeve.

2. The combination with aboat, and a motor therefor including a framework clamped to the stern ofthe boat, 'an upright carried by the framework, and the propeller at the lower end of said upright; of an eX- haust pine connected at its upper end with the exhaust of the motor, its body led downward alongside said upright, and its lower end having an elbow whose outlet end is directed rearward toward the propeller, the pipe being made in sections telescoping 0n each other, a clamp for holding the sections after they are adjusted, and clam s for connecting said sections with the and upright.

3. The combination with a boat, and a motor therefor including a framework clamped to the stern of the boat, an upright sleeve carried by the framework, and the propeller at the lower end of sa1d sleeve; of a exhaust made in Atwo sections whose meeting ends are telescopically mounted upon each other, a clamp for holdin said ends after the have been adjuste the upper end of` t e upper section being connected with the motor-exhaust and the lower end of the lower section being directed .to the 'rear in front of the propeller, means for connecting said sections with the framework and sleeve; the upper section being provided with a relief opening, and means 'for closing the latter at will.

4. The combination with a boat, and a motor therefor including a framework clamped to the sternof the boat, an upright carried by the framework, andthe propeller at the lower end of said upright; of an exhaust made in two sections whose meeting ends are telescopically mounted upon each other, a clamp for holding said ends afterv they have been adjusted, the upper end of the uppermsection being connected with the motor-exhaust and the lower end of the front of the propeller, means for connecting said sections with the framework; the upper section having` elbows within its length throwingv its upper extremity out of alinement with the lower section and also being ramework .lower section being directed to the rear in piercedwith ,a relief opening between said elbows,- a collar slidably mounted onthis section between its elbows and adapted to' be moved over .said opening, a clamp surrounding said collar, and 4a set screw through the clampl arms, for the purpose set forth.

5. The combination with a boat, and a` motor therefor including a framework claniped to the. stern of the boat, an upri ht 4carried by the framework, and the propel er at thev lower end of said`upright; of'an ex" haust made in two sections whose meeting ends are telescopically mounted upon each other, means for holdln said sections after they have been adjuste the upper end of the upper section being connected with the motor-exhaust and the lower end of the lower section being directed to the rear, means for connectlng said sections with the framework, the upper section having u 10 relief opening, and a collar slidably mounted on this section and adapted to be'moved over said opening, for the purpose set forth. In testimony whereof I have hereunto set my hand n presence of two subscribing witnesses.

MiLoN VAL MILLER.

Witnesses:

FRAXANA ELLEN MILLER, MARY Rosn'rrHA MILLER. 

